Elsevier Full Stack Developer interview questions

Very unhappy with the lack of professionalism displayed. I was initially contacted by an in-house recruiter on LinkedIn, we scheduled a call that lasted for 30-45 minutes. The recruiter was very friendly and the phone call was mostly a culture test as well as explaining what Elsevier is about. He did not seem to be overly clued up on the tech stack used etc. but that was not a problem. The phone call seemed to go very well. I was asked to email the recruiter my desired salary along with my reason for pursuing a position with Elsevier. Fast forward 2-3 weeks and I had not heard anything. Not even a reply to my previous email. Out of the blue I received an email from someone I had not been in contact with before, she asked if I would be available for a phone interview with a development manager. I spent a good amount of time preparing for this phone call. Again, I feel that the phone call went very well. I had an answer for every question, I was prepared with my own questions. I had also spent considerable time researching Elsevier. At the end of the phone call, I was told it went very well and that they would like me to come in and meet the team. I was given absolutely no indication that there would be an issue. I never heard from them again. Elsevier, I did not take time out of work to prepare, only for my time to be wasted. Be honest with applicant's and treat them professionally.